The Savi 440 has  best-in-class PC sound quality with a versatile headset that can be worn three ways to match your personal style. 
W440: UC Standard version built for UC applications and softphones from Avaya®, Cisco®, IBM®, Skype® and more.
 
Features
120 meter range
3 Different wearing styles
DECT 6.0 Technology
Lightest headset on the market (22g)
Wideband audio technology
NC Microphone
One touch controls at your finger tips: Volume | Mute | Answer | End
Compatible with all softphone technology